Subsections

- Library
- Description
- Dialog Box
- Default properties
- Interfacing function
- Computational function (type 2)

##
Iselect

### Library

Branching

### Description

### Dialog Box

Set parameters |
number of outputs | 2
initial connected output | 1

- number of outputs: a scalar. Number of regular and event outputs.
- initial connected output: an integer. It must be between 1 and the number of inputs.

### Default properties

- always active: no
- direct-feedthrough: yes
- zero-crossing: no
- mode: no
- number/sizes of inputs: 1 / -1
- number/sizes of outputs: 2 / -1 -1
- number/sizes of activation inputs: 2 / 1 1
- number/sizes of activation outputs: 0 /
- continuous-time state: no
- discrete-time state: yes
- name of computational function: selector

### Interfacing function

`scilab/macros/scicos_blocks/branching/ISELECT_f.sci`

### Computational function (type 2)

    /* Copyright INRIA */
    #include "../machine.h"

    void
    selector(flag,nevprt,t,xd,x,nx,z,nz,tvec,ntvec,rpar,nrpar,
    	       ipar,nipar,inptr,insz,nin,outptr,outsz,nout)
    integer *flag,*nevprt,*nx,*nz,*ntvec,*nrpar,ipar[],*nipar,insz[],*nin,outsz[],*nout;
    double x[],xd[],z[],tvec[],rpar[];
    double *inptr[],*outptr[],*t;

    {
        int k;
        double *y;
        double *u;
        int nev,ic;

        ic=(int)z[0];
        if ((*flag)<3) {
    	ic=-1;
    	nev=*nevprt;
    	while (nev>=1) {
    	    ic=ic+1;
    	    nev=nev/2;
    	}
        }
        if (*nin>1) {
          y=(double *)outptr[0];
          u=(double *)inptr[ic];
          for (k=0;k<outsz[0];k++)
    	*(y++)=*(u++);
        }
        else {
          y=(double *)outptr[ic];
          u=(double *)inptr[0];
          for (k=0;k<outsz[0];k++)
    	*(y++)=*(u++);
        }
    }